Two identical balls $A$ and $B$ are released from the positions shown in figure. They collide elastically on horizontal portion $MN$. The ratio of the height attained by $A$ and $B$ after collision will be: (neglect friction)
Two identical balls $A$ and $B$ are released from the positions shown in figure. They collide elastically on horizontal portion $MN$. The ratio of the height attained by $A$ and $B$ after collision will be: (neglect friction)
- A
$1 : 4$
- B
$2 : 1$
- C
$4 : 13$
- D
$2 : 5$
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